Rerun Chunky over existing terrain without treating it as world regeneration

Pregeneration fills terrain; it is not the same operation as replacing an existing world with a new seed. Before rerunning a familiar area, decide whether you are verifying coverage or expecting blocks to change. Existing player builds must remain outside any destructive regeneration plan.

Work through the change

1. Record the world identity, seed and generation settings, along with a recent world backup. Mark a few existing builds and an ungenerated edge as reference locations for the trial.
2. Read the current Chunky documentation on existing chunks and check your installed configuration. Do not enable an unfamiliar force or regeneration option copied from a different tool.
3. Select a small area that includes known terrain and the intended edge. Run the ordinary pregeneration task and compare progress with actual world changes at the recorded coordinates.
4. Inspect the reference builds after the task and check the new edge terrain. If your goal was a new seed or replaced landscape, stop and plan that separately rather than increasing Chunky’s radius.

Check the result

The result should match ordinary pregeneration behaviour for the installed version while preserving established terrain. Counts may include checks or skipped chunks and do not necessarily mean each reported chunk was newly generated. Verify the world itself instead of interpreting the progress number as a rewrite total.

A generated map is not a clean test map merely because it has few players. Check claims and scheduled activity before selecting the pilot area used to demonstrate existing-terrain behaviour.

Recover or stop safely

Pause if unexpected changes appear and preserve logs, settings and the world checkpoint. Restore only through a deliberate recovery procedure after identifying the cause. Do not continue a larger task to see whether a damaged area repairs itself; Chunky is not a backup restoration mechanism.

Related guidance and maintainer reference

For the broader setup, read Pre-generate Minecraft terrain with Chunky and monitor disk space. Check the installed plugin version before applying syntax from the official Chunky documentation.